tests/testthat/test-reprex.R

In reprex: Prepare Reproducible Example Code via the Clipboard

## https://github.com/tidyverse/reprex/issues/152
test_that("keep.source is TRUE inside the reprex()", {
  skip_on_cran()
  ret <- reprex(input = "getOption('keep.source')\n")
  expect_match(ret, "TRUE", all = FALSE)
})

test_that("reprex() works with code that deals with srcrefs", {
  skip_on_cran()
  ret <- reprex(
    input = "utils::getParseData(parse(text = 'a'))\n",
    advertise = FALSE
  )
  expect_snapshot_output(print(ret))
})

## https://github.com/tidyverse/reprex/issues/183
test_that("reprex() doesn't leak files by default", {
  skip_on_cran()
  reprex(base::writeLines("test", "test.txt"), advertise = FALSE)
  ret <- reprex(base::readLines("test.txt"), advertise = FALSE)
  expect_match(ret, "cannot open file 'test.txt'", all = FALSE)
})

test_that("rmarkdown::render() context is trimmed from rlang backtrace", {
  skip_on_cran()
  input <- c(
    "f <- function() rlang::abort('foo')",
    "f()",
    "rlang::last_error()",
    "rlang::last_trace()"
  )
  ret <- reprex(input = input, advertise = FALSE)
  expect_false(any(grepl("tryCatch", ret)))
  expect_false(any(grepl("rmarkdown::render", ret)))
})

test_that("rlang::last_error() and last_trace() work", {
  skip_on_cran()

  input <- c(
    "f <- function() rlang::abort('foo')",
    "f()",
    # as of rlang 1.0.0 (2022-01-26)
    # https://github.com/r-lib/rlang/blame/0e2718639d7b87effbf47cf17d6e0288a69454e6/NEWS.md#L350-L354
    "#'", # currently, this must be in a new chunk
    "rlang::last_error()",
    "rlang::last_trace()"
  )
  ret <- reprex(input = input, advertise = FALSE)
  m <- match("rlang::last_error()", ret)
  expect_false(grepl("Error", ret[m + 1]))
  m <- match("rlang::last_trace()", ret)
  expect_false(grepl("Error", ret[m + 1]))
})

test_that("reprex() works even if user uses fancy quotes", {
  skip_on_cran()
  withr::local_options(list(useFancyQuotes = TRUE))
  # use non-default venue to force some quoted yaml to be written
  expect_error_free(reprex(1, venue = "R"))
})

test_that("reprex() errors for an R crash, by default", {
  # TODO: consider switching to expect_snapshot() after switch to 3e
  code <- 'utils::getFromNamespace("crash", "callr")()\n'
  expect_error(reprex(input = code), "crash")
})

test_that("reprex() copes with an R crash, when `std_out_err = TRUE`", {
  # TODO: consider switching to expect_snapshot() after switch to 3e
  code <- 'utils::getFromNamespace("crash", "callr")()\n'
  expect_error_free(
    out <- reprex(input = code, std_out_err = TRUE)
  )
  skip_on_os("windows")
  expect_match(out, "crash", all = FALSE)
  expect_match(out, "segfault", all = FALSE)
  expect_match(out, "Traceback", all = FALSE)
})